Suddenly our contact update external event started failing ?

Content

Please see the SOAP error log - any help appreciated - how to resolve this ?

 

Internal Error
        File: util.c
        Line: 1076
      In Fcn: rnt_gearman_call_job
  Called Fcn: gearman_client_do() returned 46
 Description: error running task
Customizable
        Code: external event
-- PHP Call Stack ------------------------------------
#0  in commit at contact_update\contact_update:20
#1  in apply at contact_update\contact_update:1
-- Call Stack ----------------------------------------
#0  in rnt_gearman_call_job at util.c:1038
#1  in SPMScheduler::start at SPMScheduler.cpp:180
#2  in SPMScheduler::start at SPMScheduler.cpp:160
#3  in spm_objprocs_postcommit at spm.cpp:518
#4  in event_fire at c_api_wrappers.cpp:31